[]
[ 'result' => [ 'array' => [ 'procedure' => 'get_defined_vars', 'arg_number' => 0, 'v' => [ ], ], ], 'php_version' => '5.6.8 WINNT i586',]
[ 'result' => [ 'array' => NULL, ], 'errors' => [ 0 => [ 'code' => 2, 'message' => 'Cannot call get_defined_vars() dynamically', ], ], 'php_version' => '7.1.33 Linux x86_64',]